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<h3 id="&#x603B;&#x4F53;&#x62BD;&#x8C61;">&#x603B;&#x4F53;&#x62BD;&#x8C61;</h3>
<p>&#x4E3A;&#x6B64;&#xFF0C;&#x6211;&#x4EEC;&#x53E6;&#x8BBE;&#x8BA1;&#x51E0;&#x79CD;&#x6570;&#x636E;&#x7ED3;&#x6784;&#x6765;&#x62BD;&#x8C61;&#x8FD9;&#x4E2A;&#x8FC7;&#x7A0B;&#xFF1A;</p>
<p><img src="figures/memory_set.jpg" alt=""></p>
<p>&#x5728;&#x865A;&#x62DF;&#x5185;&#x5B58;&#x4E2D;&#xFF0C;&#x6BCF;&#x4E2A; <code>MemoryArea</code> &#x63CF;&#x8FF0;&#x4E00;&#x4E2A;&#x6BB5;&#xFF0C;&#x6BCF;&#x4E2A;&#x6BB5;&#x5355;&#x72EC;&#x6620;&#x5C04;&#x5230;&#x7269;&#x7406;&#x5185;&#x5B58;&#xFF1B;<code>MemorySet</code> &#x4E2D;&#x5219;&#x5B58;&#x50A8;&#x6240;&#x6709;&#x7684; <code>MemoryArea</code> &#x6BB5;&#xFF0C;&#x76F8;&#x6BD4;&#x5DE8;&#x5927;&#x7684;&#x865A;&#x62DF;&#x5185;&#x5B58;&#x7A7A;&#x95F4;&#xFF0C;&#x7531;&#x4E8E;&#x5B83;&#x542B;&#x6709;&#x7684;&#x5404;&#x4E2A;&#x6BB5;&#x90FD;&#x5DF2;&#x7ECF;&#x6620;&#x5C04;&#x5230;&#x7269;&#x7406;&#x5185;&#x5B58;&#xFF0C;&#x5B83;&#x53EF;&#x8868;&#x793A;&#x4E00;&#x4E2A;&#x7A0B;&#x5E8F;&#x72EC;&#x81EA;&#x62E5;&#x6709;&#x7684;<strong>&#x5B9E;&#x9645;&#x53EF;&#x7528;</strong>&#x7684;&#x865A;&#x62DF;&#x5185;&#x5B58;&#x7A7A;&#x95F4;&#x3002;<code>PageTable</code> &#x76F8;&#x5F53;&#x4E8E;&#x4E00;&#x4E2A;&#x5E95;&#x5C42;&#x63A5;&#x53E3;&#xFF0C;&#x4EC5;&#x662F;&#x7BA1;&#x7406;&#x6620;&#x5C04;&#xFF0C;&#x4E8B;&#x5B9E;&#x4E0A;&#x5B83;&#x7BA1;&#x7406;&#x4E86; <code>MemorySet</code> &#x4E2D;&#x6240;&#x6709; <code>MemoryArea</code> &#x7684;&#x6240;&#x6709;&#x6620;&#x5C04;&#x3002;</p>
<h3 id="memoryarea">MemoryArea</h3>
<p>&#x6211;&#x4EEC;&#x523B;&#x610F;&#x5C06;&#x4E0D;&#x540C;&#x7684;&#x6BB5;&#x5206;&#x4E3A;&#x4E0D;&#x540C;&#x7684; <code>MemoryArea</code> &#xFF0C;&#x8BF4;&#x660E;&#x5B83;&#x4EEC;&#x6620;&#x5C04;&#x5230;&#x7269;&#x7406;&#x5185;&#x5B58;&#x7684;&#x65B9;&#x5F0F;&#x53EF;&#x4EE5;&#x662F;&#x4E0D;&#x540C;&#x7684;&#xFF1A;</p>
<p><img src="figures/memory_handler.jpg" alt=""></p>
<p>&#x6211;&#x4EEC;&#x5219;&#x4F7F;&#x7528; <code>MemoryHandler</code> &#x6765;&#x63CF;&#x8FF0;&#x6620;&#x5C04;&#x884C;&#x4E3A;&#x7684;&#x4E0D;&#x540C;&#x3002;&#x4E0D;&#x540C;&#x7684;&#x7C7B;&#x578B;&#x7684; <code>MemoryArea</code>&#xFF0C;&#x4F1A;&#x4F7F;&#x7528;&#x4E0D;&#x540C;&#x7684; <code>MemoryHandler</code> &#xFF0C;&#x800C;&#x4ED6;&#x4EEC;&#x4F1A;&#x7528;&#x4E0D;&#x540C;&#x7684;&#x65B9;&#x5F0F;&#x8C03;&#x7528; <code>PageTable</code> &#x63D0;&#x4F9B;&#x7684;&#x5E95;&#x5C42;&#x63A5;&#x53E3;&#x8FDB;&#x884C;&#x6620;&#x5C04;&#xFF0C;&#x56E0;&#x6B64;&#x5BFC;&#x81F4;&#x4E86;&#x6700;&#x7EC8;&#x6620;&#x5C04;&#x884C;&#x4E3A;&#x7684;&#x4E0D;&#x540C;&#x3002;</p>
<p>&#x4E0B;&#x9762;&#x6211;&#x4EEC;&#x770B;&#x4E00;&#x4E0B;&#x8FD9;&#x4E9B;&#x7C7B;&#x662F;&#x5982;&#x4F55;&#x5B9E;&#x73B0;&#x7684;&#x3002;</p>
<h4 id="memoryattr">MemoryAttr</h4>
<p>&#x9996;&#x5148;&#x662F;&#x7528;&#x6765;&#x4FEE;&#x6539; <code>PageEntry</code> (&#x6211;&#x4EEC;&#x7684;&#x9875;&#x8868;&#x6620;&#x5C04;&#x9ED8;&#x8BA4;&#x5C06;&#x6743;&#x9650;&#x8BBE;&#x4E3A; <code>R|W|X</code> &#xFF0C;&#x9700;&#x8981;&#x4FEE;&#x6539;) &#x7684;&#x7C7B; <code>MemoryAttr</code>&#xFF1A;</p>
<pre class="language-"><code class="lang-rust"><span class="token comment">// src/memory/memory_set/attr.rs</span>
<span class="token punctuation">...</span><span class="token punctuation">...</span>
<span class="token keyword">pub</span> <span class="token keyword">struct</span> <span class="token type-definition class-name">MemoryAttr</span> <span class="token punctuation">{</span>
    user <span class="token punctuation">:</span> <span class="token keyword">bool</span><span class="token punctuation">,</span>    <span class="token comment">// &#x7528;&#x6237;&#x6001;&#x662F;&#x5426;&#x53EF;&#x8BBF;&#x95EE;</span>
    readonly <span class="token punctuation">:</span> <span class="token keyword">bool</span><span class="token punctuation">,</span>    <span class="token comment">// &#x662F;&#x5426;&#x53EA;&#x8BFB;</span>
    execute <span class="token punctuation">:</span> <span class="token keyword">bool</span><span class="token punctuation">,</span>      <span class="token comment">// &#x662F;&#x5426;&#x53EF;&#x6267;&#x884C;</span>
<span class="token punctuation">}</span>

<span class="token keyword">impl</span> <span class="token class-name">MemoryAttr</span> <span class="token punctuation">{</span>
    <span class="token comment">// &#x9ED8;&#x8BA4; &#x7528;&#x6237;&#x6001;&#x4E0D;&#x53EF;&#x8BBF;&#x95EE;&#xFF1B;&#x53EF;&#x5199;&#xFF1B;&#x4E0D;&#x53EF;&#x6267;&#x884C;&#xFF1B;</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">new</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token keyword">Self</span><span class="token punctuation">{</span>
        <span class="token class-name">MemoryAttr</span> <span class="token punctuation">{</span>
            user <span class="token punctuation">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
            readonly <span class="token punctuation">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
            execute <span class="token punctuation">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
        <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
    <span class="token comment">// &#x6839;&#x636E;&#x8981;&#x6C42;&#x4FEE;&#x6539;&#x6240;&#x9700;&#x6743;&#x9650;</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">set_user</span><span class="token punctuation">(</span><span class="token keyword">mut</span> <span class="token keyword">self</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token keyword">Self</span> <span class="token punctuation">{</span>
        <span class="token keyword">self</span><span class="token punctuation">.</span>user <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>  <span class="token keyword">self</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">set_readonly</span><span class="token punctuation">(</span><span class="token keyword">mut</span> <span class="token keyword">self</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token keyword">Self</span> <span class="token punctuation">{</span>
        <span class="token keyword">self</span><span class="token punctuation">.</span>readonly <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>  <span class="token keyword">self</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">set_execute</span><span class="token punctuation">(</span><span class="token keyword">mut</span> <span class="token keyword">self</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token keyword">Self</span> <span class="token punctuation">{</span>
        <span class="token keyword">self</span><span class="token punctuation">.</span>execute <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">;</span>   <span class="token keyword">self</span>
    <span class="token punctuation">}</span>
    <span class="token comment">// &#x6839;&#x636E;&#x8BBE;&#x7F6E;&#x7684;&#x6743;&#x9650;&#x8981;&#x6C42;&#x4FEE;&#x6539;&#x9875;&#x8868;&#x9879;</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">apply</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">,</span> entry <span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token class-name">PageEntry</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        entry<span class="token punctuation">.</span><span class="token function">set_present</span><span class="token punctuation">(</span><span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>    <span class="token comment">// &#x8BBE;&#x7F6E;&#x9875;&#x8868;&#x9879;&#x5B58;&#x5728;</span>
        entry<span class="token punctuation">.</span><span class="token function">set_user</span><span class="token punctuation">(</span><span class="token keyword">self</span><span class="token punctuation">.</span>user<span class="token punctuation">)</span><span class="token punctuation">;</span>  <span class="token comment">// &#x8BBE;&#x7F6E;&#x7528;&#x6237;&#x6001;&#x8BBF;&#x95EE;&#x6743;&#x9650;</span>
        entry<span class="token punctuation">.</span><span class="token function">set_writable</span><span class="token punctuation">(</span><span class="token operator">!</span><span class="token keyword">self</span><span class="token punctuation">.</span>readonly<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">//&#x8BBE;&#x7F6E;&#x5199;&#x6743;&#x9650;</span>
        entry<span class="token punctuation">.</span><span class="token function">set_execute</span><span class="token punctuation">(</span><span class="token keyword">self</span><span class="token punctuation">.</span>execute<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">//&#x8BBE;&#x7F6E;&#x53EF;&#x6267;&#x884C;&#x6743;&#x9650;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<h4 id="memoryhandler">MemoryHandler</h4>
<p>&#x7136;&#x540E;&#x662F;&#x4F1A;&#x4EE5;&#x4E0D;&#x540C;&#x65B9;&#x5F0F;&#x8C03;&#x7528; <code>PageTable</code> &#x63A5;&#x53E3;&#x7684; <code>MemoryHandler</code>&#xFF1A;</p>
<pre class="language-"><code class="lang-rust"><span class="token comment">// src/memory/memory_set/handler.rs</span>
<span class="token punctuation">...</span><span class="token punctuation">...</span>
<span class="token comment">// &#x5B9A;&#x4E49; MemoryHandler trait</span>
<span class="token keyword">pub</span> <span class="token keyword">trait</span> <span class="token class-name">MemoryHandler</span><span class="token punctuation">:</span> <span class="token class-name">Debug</span> <span class="token operator">+</span> <span class="token lifetime-annotation symbol">&apos;static</span> <span class="token punctuation">{</span>
    <span class="token keyword">fn</span> <span class="token function-definition function">box_clone</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token class-name">Box</span><span class="token operator">&lt;</span><span class="token keyword">dyn</span> <span class="token class-name">MemoryHandler</span><span class="token operator">&gt;</span><span class="token punctuation">;</span>
    <span class="token comment">// &#x9700;&#x8981;&#x5B9E;&#x73B0; map, unmap &#x4E24;&#x51FD;&#x6570;,&#x4E0D;&#x540C;&#x7684;&#x63A5;&#x53E3;&#x5B9E;&#x73B0;&#x8005;&#x4F1A;&#x6709;&#x4E0D;&#x540C;&#x7684;&#x884C;&#x4E3A;</span>
    <span class="token comment">// &#x6CE8;&#x610F; map &#x5E76;&#x6CA1;&#x6709; pa &#x4F5C;&#x4E3A;&#x53C2;&#x6570;&#xFF0C;&#x56E0;&#x6B64;&#x63A5;&#x53E3;&#x5B9E;&#x73B0;&#x8005;&#x8981;&#x7ED9;&#x51FA;&#x8BE5;&#x865A;&#x62DF;&#x9875;&#x8981;&#x6620;&#x5C04;&#x5230;&#x54EA;&#x4E2A;&#x7269;&#x7406;&#x9875;</span>
    <span class="token keyword">fn</span> <span class="token function-definition function">map</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">,</span> pt<span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token class-name">PageTableImpl</span><span class="token punctuation">,</span> va<span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">,</span> attr<span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token class-name">MemoryAttr</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">fn</span> <span class="token function-definition function">unmap</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">,</span> pt<span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token class-name">PageTableImpl</span><span class="token punctuation">,</span> va<span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token punctuation">...</span><span class="token punctuation">...</span>
<span class="token comment">// &#x4E0B;&#x9762;&#x7ED9;&#x51FA;&#x4E24;&#x79CD;&#x5B9E;&#x73B0; Linear, ByFrame</span>
<span class="token comment">// &#x7EBF;&#x6027;&#x6620;&#x5C04; Linear: &#x4E5F;&#x5C31;&#x662F;&#x6211;&#x4EEC;&#x4E00;&#x76F4;&#x5728;&#x7528;&#x7684;&#x5E26;&#x4E00;&#x4E2A;&#x504F;&#x79FB;&#x91CF;&#x7684;&#x5F62;&#x5F0F;</span>
<span class="token comment">// &#x6709;&#x4E86;&#x504F;&#x79FB;&#x91CF;&#xFF0C;&#x6211;&#x4EEC;&#x5C31;&#x77E5;&#x9053;&#x865A;&#x62DF;&#x9875;&#x8981;&#x6620;&#x5C04;&#x5230;&#x54EA;&#x4E2A;&#x7269;&#x7406;&#x9875;&#x4E86;</span>
<span class="token keyword">pub</span> <span class="token keyword">struct</span> <span class="token type-definition class-name">Linear</span> <span class="token punctuation">{</span> offset<span class="token punctuation">:</span> <span class="token keyword">usize</span> <span class="token punctuation">}</span>
<span class="token keyword">impl</span> <span class="token class-name">Linear</span> <span class="token punctuation">{</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">new</span><span class="token punctuation">(</span>off<span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token keyword">Self</span> <span class="token punctuation">{</span> <span class="token class-name">Linear</span> <span class="token punctuation">{</span> offset<span class="token punctuation">:</span> off<span class="token punctuation">,</span> <span class="token punctuation">}</span>  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
<span class="token keyword">impl</span> <span class="token class-name">MemoryHandler</span> <span class="token keyword">for</span> <span class="token class-name">Linear</span> <span class="token punctuation">{</span>
    <span class="token keyword">fn</span> <span class="token function-definition function">box_clone</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token class-name">Box</span><span class="token operator">&lt;</span><span class="token keyword">dyn</span> <span class="token class-name">MemoryHandler</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span> <span class="token class-name">Box</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span><span class="token keyword">self</span><span class="token punctuation">.</span><span class="token function">clone</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">}</span>
    <span class="token keyword">fn</span> <span class="token function-definition function">map</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">,</span> pt<span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token class-name">PageTableImpl</span><span class="token punctuation">,</span> va<span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">,</span> attr<span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token class-name">MemoryAttr</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">// &#x6620;&#x5C04;&#x5230; pa = va - self.offset</span>
        <span class="token comment">// &#x540C;&#x65F6;&#x8FD8;&#x4F7F;&#x7528; attr.apply &#x4FEE;&#x6539;&#x4E86;&#x539F;&#x5148;&#x9ED8;&#x8BA4;&#x4E3A; R|W|X &#x7684;&#x6743;&#x9650;</span>
        attr<span class="token punctuation">.</span><span class="token function">apply</span><span class="token punctuation">(</span>pt<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span>va<span class="token punctuation">,</span> va <span class="token operator">-</span> <span class="token keyword">self</span><span class="token punctuation">.</span>offset<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">fn</span> <span class="token function-definition function">unmap</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">,</span> pt<span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token class-name">PageTableImpl</span><span class="token punctuation">,</span> va<span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> pt<span class="token punctuation">.</span><span class="token function">unmap</span><span class="token punctuation">(</span>va<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
<span class="token comment">// ByFrame: &#x4E0D;&#x77E5;&#x9053;&#x6620;&#x5C04;&#x5230;&#x54EA;&#x4E2A;&#x7269;&#x7406;&#x9875;&#x5E27;</span>
<span class="token comment">// &#x90A3;&#x6211;&#x4EEC;&#x5C31;&#x5206;&#x914D;&#x4E00;&#x4E2A;&#x65B0;&#x7684;&#x7269;&#x7406;&#x9875;&#x5E27;&#xFF0C;&#x53EF;&#x4EE5;&#x4FDD;&#x8BC1;&#x4E0D;&#x4F1A;&#x4EA7;&#x751F;&#x51B2;&#x7A81;</span>
<span class="token keyword">pub</span> <span class="token keyword">struct</span> <span class="token type-definition class-name">ByFrame</span><span class="token punctuation">;</span>
<span class="token keyword">impl</span> <span class="token class-name">ByFrame</span> <span class="token punctuation">{</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">new</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token keyword">Self</span> <span class="token punctuation">{</span> <span class="token class-name">ByFrame</span> <span class="token punctuation">{</span><span class="token punctuation">}</span> <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
<span class="token keyword">impl</span> <span class="token class-name">MemoryHandler</span> <span class="token keyword">for</span> <span class="token class-name">ByFrame</span> <span class="token punctuation">{</span>
    <span class="token keyword">fn</span> <span class="token function-definition function">box_clone</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token class-name">Box</span><span class="token operator">&lt;</span><span class="token keyword">dyn</span> <span class="token class-name">MemoryHandler</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
        <span class="token class-name">Box</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span><span class="token keyword">self</span><span class="token punctuation">.</span><span class="token function">clone</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">fn</span> <span class="token function-definition function">map</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">,</span> pt<span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token class-name">PageTableImpl</span><span class="token punctuation">,</span> va<span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">,</span> attr<span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token class-name">MemoryAttr</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">// &#x5206;&#x914D;&#x4E00;&#x4E2A;&#x7269;&#x7406;&#x9875;&#x5E27;&#x4F5C;&#x4E3A;&#x6620;&#x5C04;&#x76EE;&#x6807;</span>
        <span class="token keyword">let</span> frame <span class="token operator">=</span> <span class="token function">alloc_frame</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">expect</span><span class="token punctuation">(</span><span class="token string">&quot;alloc_frame failed!&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">let</span> pa <span class="token operator">=</span> frame<span class="token punctuation">.</span><span class="token function">start_address</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">as_usize</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        attr<span class="token punctuation">.</span><span class="token function">apply</span><span class="token punctuation">(</span>pt<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span>va<span class="token punctuation">,</span> pa<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">fn</span> <span class="token function-definition function">unmap</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">,</span> pt<span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token class-name">PageTableImpl</span><span class="token punctuation">,</span> va<span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        pt<span class="token punctuation">.</span><span class="token function">unmap</span><span class="token punctuation">(</span>va<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<p>&#x63A5;&#x7740;&#xFF0C;&#x662F;&#x63CF;&#x8FF0;&#x4E00;&#x4E2A;&#x6BB5;&#x7684; <code>MemoryArea</code>&#x3002;</p>
<pre class="language-"><code class="lang-rust"><span class="token comment">// src/memory/memory_set/area.rs</span>

<span class="token comment">// &#x58F0;&#x660E;&#x4E2D;&#x7ED9;&#x51FA;&#x6240;&#x5728;&#x7684;&#x865A;&#x62DF;&#x5730;&#x5740;&#x533A;&#x95F4;: [start, end)</span>
<span class="token comment">// &#x4F7F;&#x7528;&#x7684; MemoryHandler&#xFF1A; handler</span>
<span class="token comment">// &#x9875;&#x8868;&#x9879;&#x7684;&#x6743;&#x9650;&#xFF1A; attr</span>
<span class="token keyword">pub</span> <span class="token keyword">struct</span> <span class="token type-definition class-name">MemoryArea</span> <span class="token punctuation">{</span>
    start <span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">,</span>
    end <span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">,</span>
    handler <span class="token punctuation">:</span> <span class="token class-name">Box</span><span class="token operator">&lt;</span><span class="token keyword">dyn</span> <span class="token class-name">MemoryHandler</span><span class="token operator">&gt;</span><span class="token punctuation">,</span>
    attr <span class="token punctuation">:</span> <span class="token class-name">MemoryAttr</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span>

<span class="token keyword">impl</span> <span class="token class-name">MemoryArea</span> <span class="token punctuation">{</span>
    <span class="token comment">// &#x540C;&#x6837;&#x662F;&#x63D2;&#x5165;&#x3001;&#x5220;&#x9664;&#x6620;&#x5C04;</span>
    <span class="token comment">// &#x904D;&#x5386;&#x865A;&#x62DF;&#x5730;&#x5740;&#x533A;&#x95F4;&#x5305;&#x542B;&#x7684;&#x6240;&#x6709;&#x865A;&#x62DF;&#x9875;&#xFF0C;&#x4F9D;&#x6B21;&#x5229;&#x7528; handler &#x5B8C;&#x6210;&#x6620;&#x5C04;&#x63D2;&#x5165;/&#x5220;&#x9664;</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">map</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">,</span> pt <span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token class-name">PageTableImpl</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">// &#x4F7F;&#x7528;&#x81EA;&#x5DF1;&#x5B9A;&#x4E49;&#x7684;&#x8FED;&#x4EE3;&#x5668;&#x8FDB;&#x884C;&#x904D;&#x5386;&#xFF0C;&#x5B9E;&#x73B0;&#x5728; src/memory/paging.rs &#x4E2D;</span>
        <span class="token comment">// &#x653E;&#x5728;&#x4E0B;&#x9762;</span>
        <span class="token keyword">for</span> page <span class="token keyword">in</span> <span class="token class-name">PageRange</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span><span class="token keyword">self</span><span class="token punctuation">.</span>start<span class="token punctuation">,</span> <span class="token keyword">self</span><span class="token punctuation">.</span>end<span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token keyword">self</span><span class="token punctuation">.</span>handler<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span>pt<span class="token punctuation">,</span> page<span class="token punctuation">,</span> <span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">.</span>attr<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">fn</span> <span class="token function-definition function">unmap</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">,</span> pt <span class="token punctuation">:</span> <span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token class-name">PageTableImpl</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">for</span> page <span class="token keyword">in</span> <span class="token class-name">PageRange</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span><span class="token keyword">self</span><span class="token punctuation">.</span>start<span class="token punctuation">,</span> <span class="token keyword">self</span><span class="token punctuation">.</span>end<span class="token punctuation">)</span> <span class="token punctuation">{</span>
            <span class="token keyword">self</span><span class="token punctuation">.</span>handler<span class="token punctuation">.</span><span class="token function">unmap</span><span class="token punctuation">(</span>pt<span class="token punctuation">,</span> page<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
    <span class="token comment">// &#x662F;&#x5426;&#x4E0E;&#x53E6;&#x4E00;&#x865A;&#x62DF;&#x5730;&#x5740;&#x533A;&#x95F4;&#x76F8;&#x4EA4;</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">is_overlap_with</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">,</span> start_addr <span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">,</span> end_addr <span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token keyword">bool</span> <span class="token punctuation">{</span>
        <span class="token keyword">let</span> p1 <span class="token operator">=</span> <span class="token keyword">self</span><span class="token punctuation">.</span>start <span class="token operator">/</span> <span class="token constant">PAGE_SIZE</span><span class="token punctuation">;</span>
        <span class="token keyword">let</span> p2 <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token keyword">self</span><span class="token punctuation">.</span>end <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">/</span> <span class="token constant">PAGE_SIZE</span> <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">;</span>
        <span class="token keyword">let</span> p3 <span class="token operator">=</span> start_addr <span class="token operator">/</span> <span class="token constant">PAGE_SIZE</span><span class="token punctuation">;</span>
        <span class="token keyword">let</span> p4 <span class="token operator">=</span> <span class="token punctuation">(</span>end_addr <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">/</span> <span class="token constant">PAGE_SIZE</span> <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">;</span>
        <span class="token operator">!</span><span class="token punctuation">(</span><span class="token punctuation">(</span>p1 <span class="token operator">&gt;=</span> p4<span class="token punctuation">)</span> <span class="token operator">||</span> <span class="token punctuation">(</span>p2 <span class="token operator">&lt;=</span> p3<span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">}</span>
    <span class="token comment">// &#x521D;&#x59CB;&#x5316;</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">new</span><span class="token punctuation">(</span>start_addr <span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">,</span> end_addr <span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">,</span> handler <span class="token punctuation">:</span> <span class="token class-name">Box</span><span class="token operator">&lt;</span><span class="token keyword">dyn</span> <span class="token class-name">MemoryHandler</span><span class="token operator">&gt;</span><span class="token punctuation">,</span> attr <span class="token punctuation">:</span> <span class="token class-name">MemoryAttr</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token keyword">Self</span> <span class="token punctuation">{</span>
        <span class="token class-name">MemoryArea</span><span class="token punctuation">{</span>
            start <span class="token punctuation">:</span> start_addr<span class="token punctuation">,</span>
            end <span class="token punctuation">:</span> end_addr<span class="token punctuation">,</span>
            handler <span class="token punctuation">:</span> handler<span class="token punctuation">,</span>
            attr <span class="token punctuation">:</span> attr<span class="token punctuation">,</span>
        <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<h3 id="memoryset">MemorySet</h3>
<p>&#x6700;&#x540E;&#xFF0C;&#x5219;&#x662F;&#x6700;&#x9AD8;&#x5C42;&#x7684; <code>MemorySet</code> &#xFF0C;&#x5B83;&#x63CF;&#x8FF0;&#x4E00;&#x4E2A;<strong>&#x5B9E;&#x9645;&#x53EF;&#x7528;</strong>&#x7684;&#x865A;&#x62DF;&#x5730;&#x5740;&#x7A7A;&#x95F4;&#x4EE5;&#x4F9B;&#x7A0B;&#x5E8F;&#x4F7F;&#x7528;&#x3002;</p>
<pre class="language-"><code class="lang-rust"><span class="token comment">// src/memory/memory_set/mod.rs</span>
<span class="token keyword">pub</span> <span class="token keyword">struct</span> <span class="token type-definition class-name">MemorySet</span> <span class="token punctuation">{</span>
    <span class="token comment">// &#x7BA1;&#x7406;&#x6709;&#x54EA;&#x4E9B; MemoryArea</span>
    areas<span class="token punctuation">:</span> <span class="token class-name">Vec</span><span class="token operator">&lt;</span><span class="token class-name">MemoryArea</span><span class="token operator">&gt;</span><span class="token punctuation">,</span>
    <span class="token comment">// &#x4F7F;&#x7528;&#x9875;&#x8868;&#x6765;&#x7BA1;&#x7406;&#x5176;&#x6240;&#x6709;&#x7684;&#x6620;&#x5C04;</span>
    page_table<span class="token punctuation">:</span> <span class="token class-name">PageTableImpl</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span>

<span class="token keyword">impl</span> <span class="token class-name">MemorySet</span> <span class="token punctuation">{</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">push</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token keyword">self</span><span class="token punctuation">,</span> start<span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">,</span> end<span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">,</span> attr<span class="token punctuation">:</span> <span class="token class-name">MemoryAttr</span><span class="token punctuation">,</span> handler<span class="token punctuation">:</span> <span class="token keyword">impl</span> <span class="token class-name">MemoryHandler</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">// &#x52A0;&#x5165;&#x4E00;&#x4E2A;&#x65B0;&#x7684;&#x7ED9;&#x5B9A;&#x4E86; handler &#x4EE5;&#x53CA; attr &#x7684; MemoryArea</span>

        <span class="token comment">// &#x5408;&#x6CD5;&#x6027;&#x6D4B;&#x8BD5;</span>
        <span class="token macro property">assert!</span><span class="token punctuation">(</span>start <span class="token operator">&lt;=</span> end<span class="token punctuation">,</span> <span class="token string">&quot;invalid memory area!&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// &#x6574;&#x6BB5;&#x865A;&#x62DF;&#x5730;&#x5740;&#x7A7A;&#x95F4;&#x5747;&#x672A;&#x88AB;&#x5360;&#x636E;</span>
        <span class="token macro property">assert!</span><span class="token punctuation">(</span><span class="token keyword">self</span><span class="token punctuation">.</span><span class="token function">test_free_area</span><span class="token punctuation">(</span>start<span class="token punctuation">,</span> end<span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token string">&quot;memory area overlap!&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// &#x6784;&#x9020; MemoryArea</span>
        <span class="token keyword">let</span> area <span class="token operator">=</span> <span class="token class-name">MemoryArea</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span>start<span class="token punctuation">,</span> end<span class="token punctuation">,</span> <span class="token class-name">Box</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span>handler<span class="token punctuation">)</span><span class="token punctuation">,</span> attr<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// &#x66F4;&#x65B0;&#x672C; MemorySet &#x7684;&#x6620;&#x5C04;</span>
        area<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token keyword">self</span><span class="token punctuation">.</span>page_table<span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// &#x66F4;&#x65B0;&#x672C; MemorySet &#x7684; MemoryArea &#x96C6;&#x5408;</span>
        <span class="token keyword">self</span><span class="token punctuation">.</span>areas<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>area<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">fn</span> <span class="token function-definition function">test_free_area</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">,</span> start<span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">,</span> end<span class="token punctuation">:</span> <span class="token keyword">usize</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token keyword">bool</span> <span class="token punctuation">{</span>
        <span class="token comment">// &#x8FED;&#x4EE3;&#x5668;&#x7684;&#x57FA;&#x672C;&#x5E94;&#x7528;</span>
        <span class="token keyword">self</span><span class="token punctuation">.</span>areas
            <span class="token punctuation">.</span><span class="token function">iter</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">find</span><span class="token punctuation">(</span><span class="token closure-params"><span class="token closure-punctuation punctuation">|</span>area<span class="token closure-punctuation punctuation">|</span></span> area<span class="token punctuation">.</span><span class="token function">is_overlap_with</span><span class="token punctuation">(</span>start<span class="token punctuation">,</span> end<span class="token punctuation">)</span><span class="token punctuation">)</span>
            <span class="token punctuation">.</span><span class="token function">is_none</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
    <span class="token punctuation">}</span>
    <span class="token comment">// &#x5C06; CPU &#x6240;&#x5728;&#x7684;&#x865A;&#x62DF;&#x5730;&#x5740;&#x7A7A;&#x95F4;&#x5207;&#x6362;&#x4E3A;&#x672C; MemorySet</span>
    <span class="token keyword">pub</span> <span class="token keyword">unsafe</span> <span class="token keyword">fn</span> <span class="token function-definition function">activate</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">self</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token comment">// &#x8FD9;&#x548C;&#x5207;&#x6362;&#x5230;&#x5B58;&#x50A8;&#x5176;&#x5168;&#x90E8;&#x6620;&#x5C04;&#x7684;&#x9875;&#x8868;&#x662F;&#x4E00;&#x7801;&#x4E8B;</span>
        <span class="token keyword">self</span><span class="token punctuation">.</span>page_table<span class="token punctuation">.</span><span class="token function">activate</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<p>&#x4E8B;&#x5B9E;&#x4E0A;&#xFF0C;&#x5728;&#x5185;&#x6838;&#x4E2D;&#x8FD0;&#x884C;&#x7684;&#x6240;&#x6709;&#x7A0B;&#x5E8F;&#x90FD;&#x79BB;&#x4E0D;&#x5F00;&#x5185;&#x6838;&#x7684;&#x652F;&#x6301;&#xFF0C;&#x6240;&#x4EE5;&#x5FC5;&#x987B;&#x8981;&#x80FD;&#x591F;&#x8BBF;&#x95EE;&#x5185;&#x6838;&#x7684;&#x4EE3;&#x7801;&#x548C;&#x6570;&#x636E;&#xFF1B;&#x540C;&#x65F6;&#xFF0C;&#x4E3A;&#x4E86;&#x4FDD;&#x8BC1;&#x4EFB;&#x4F55;&#x65F6;&#x5019;&#x6211;&#x4EEC;&#x90FD;&#x53EF;&#x4EE5;&#x4FEE;&#x6539;&#x9875;&#x8868;&#xFF0C;&#x6211;&#x4EEC;&#x9700;&#x8981;&#x7269;&#x7406;&#x5185;&#x5B58;&#x7684;&#x6620;&#x5C04;&#x4E00;&#x76F4;&#x5B58;&#x5728;&#x3002;&#x56E0;&#x6B64;&#xFF0C;&#x5728;&#x4E00;&#x4E2A; <code>MemorySet</code> &#x521D;&#x59CB;&#x5316;&#x65F6;&#xFF0C;&#x6211;&#x4EEC;&#x5C31;&#x8981;&#x5C06;&#x4E0A;&#x8FF0;&#x8FD9;&#x4E9B;&#x6BB5;&#x52A0;&#x5165;&#x8FDB;&#x53BB;&#x3002;</p>
<pre class="language-"><code class="lang-rust"><span class="token comment">// src/memory/memory_set/mod.rs</span>

<span class="token keyword">impl</span> <span class="token class-name">MemorySet</span> <span class="token punctuation">{</span>
    <span class="token punctuation">...</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">new</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">-&gt;</span> <span class="token keyword">Self</span> <span class="token punctuation">{</span>
        <span class="token keyword">let</span> <span class="token keyword">mut</span> memory_set <span class="token operator">=</span> <span class="token class-name">MemorySet</span> <span class="token punctuation">{</span>
            areas<span class="token punctuation">:</span> <span class="token class-name">Vec</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
            page_table<span class="token punctuation">:</span> <span class="token class-name">PageTableImpl</span><span class="token punctuation">::</span><span class="token function">new_bare</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
        <span class="token punctuation">}</span><span class="token punctuation">;</span>
        <span class="token comment">// &#x63D2;&#x5165;&#x5185;&#x6838;&#x5404;&#x6BB5;&#x4EE5;&#x53CA;&#x7269;&#x7406;&#x5185;&#x5B58;&#x6BB5;</span>
        memory_set<span class="token punctuation">.</span><span class="token function">map_kernel_and_physical_memory</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        memory_set
    <span class="token punctuation">}</span>
    <span class="token keyword">pub</span> <span class="token keyword">fn</span> <span class="token function-definition function">map_kernel_and_physical_memory</span><span class="token punctuation">(</span><span class="token operator">&amp;</span><span class="token keyword">mut</span> <span class="token keyword">self</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">extern</span> <span class="token string">&quot;C&quot;</span> <span class="token punctuation">{</span>
            <span class="token keyword">fn</span> <span class="token function-definition function">stext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">fn</span> <span class="token function-definition function">etext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">fn</span> <span class="token function-definition function">srodata</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">fn</span> <span class="token function-definition function">erodata</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">fn</span> <span class="token function-definition function">sdata</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">fn</span> <span class="token function-definition function">edata</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">fn</span> <span class="token function-definition function">sbss</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">fn</span> <span class="token function-definition function">ebss</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
            <span class="token keyword">fn</span> <span class="token function-definition function">end</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
        <span class="token keyword">let</span> offset <span class="token operator">=</span> <span class="token constant">PHYSICAL_MEMORY_OFFSET</span><span class="token punctuation">;</span>
        <span class="token comment">// &#x5404;&#x6BB5;&#x5168;&#x90E8;&#x91C7;&#x7528;&#x504F;&#x79FB;&#x91CF;&#x56FA;&#x5B9A;&#x7684;&#x7EBF;&#x6027;&#x6620;&#x5C04;</span>
        <span class="token comment">// .text R|X</span>
        <span class="token keyword">self</span><span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>
            stext <span class="token keyword">as</span> <span class="token keyword">usize</span><span class="token punctuation">,</span>
            etext <span class="token keyword">as</span> <span class="token keyword">usize</span><span class="token punctuation">,</span>
            <span class="token class-name">MemoryAttr</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">set_readonly</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">set_execute</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
            <span class="token class-name">Linear</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span>offset<span class="token punctuation">)</span><span class="token punctuation">,</span>
        <span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// .rodata R</span>
        <span class="token keyword">self</span><span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>
            srodata <span class="token keyword">as</span> <span class="token keyword">usize</span><span class="token punctuation">,</span>
            erodata <span class="token keyword">as</span> <span class="token keyword">usize</span><span class="token punctuation">,</span>
            <span class="token class-name">MemoryAttr</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">set_readonly</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
            <span class="token class-name">Linear</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span>offset<span class="token punctuation">)</span><span class="token punctuation">,</span>
        <span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// .data R|W</span>
        <span class="token keyword">self</span><span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>
            sdata <span class="token keyword">as</span> <span class="token keyword">usize</span><span class="token punctuation">,</span>
            edata <span class="token keyword">as</span> <span class="token keyword">usize</span><span class="token punctuation">,</span>
            <span class="token class-name">MemoryAttr</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
            <span class="token class-name">Linear</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span>offset<span class="token punctuation">)</span>
        <span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// .bss R|W</span>
        <span class="token keyword">self</span><span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>
            sbss <span class="token keyword">as</span> <span class="token keyword">usize</span><span class="token punctuation">,</span>
            ebss <span class="token keyword">as</span> <span class="token keyword">usize</span><span class="token punctuation">,</span>
            <span class="token class-name">MemoryAttr</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
            <span class="token class-name">Linear</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span>offset<span class="token punctuation">)</span>
        <span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token comment">// &#x7269;&#x7406;&#x5185;&#x5B58; R|W</span>
        <span class="token keyword">self</span><span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>
            <span class="token punctuation">(</span>end <span class="token keyword">as</span> <span class="token keyword">usize</span> <span class="token operator">/</span> <span class="token constant">PAGE_SIZE</span> <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">*</span> <span class="token constant">PAGE_SIZE</span><span class="token punctuation">,</span>
            <span class="token function">access_pa_via_va</span><span class="token punctuation">(</span><span class="token constant">PHYSICAL_MEMORY_END</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
            <span class="token class-name">MemoryAttr</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
            <span class="token class-name">Linear</span><span class="token punctuation">::</span><span class="token function">new</span><span class="token punctuation">(</span>offset<span class="token punctuation">)</span><span class="token punctuation">,</span>
        <span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<p>&#x8FD9;&#x6837;&#xFF0C;&#x6709;&#x4E86;&#x4E0A;&#x9762;&#x7684;&#x62BD;&#x8C61;&#x548C;&#x5BF9;&#x5E94;&#x5B9E;&#x73B0;&#xFF0C;&#x6211;&#x4EEC;&#x5C31;&#x53EF;&#x4EE5;&#x6839;&#x636E; OS kernel &#x8FD9;&#x4E2A;&#x7A0B;&#x5E8F;&#x4E2D;&#x4E0D;&#x540C;&#x6BB5;&#x7684;&#x5C5E;&#x6027;&#x5EFA;&#x7ACB;&#x4E0D;&#x540C;&#x5C5E;&#x6027;&#x7684;&#x9875;&#x8868;&#x9879;&#xFF0C;&#x66F4;&#x52A0;&#x7CBE;&#x786E;&#x5730;&#x4F53;&#x7CFB;&#x4E86; OS kernel &#x5404;&#x4E2A;&#x90E8;&#x5206;&#x7684;&#x88AB;&#x8BBF;&#x95EE;&#x7279;&#x5F81;&#x3002;&#x5177;&#x4F53;&#x5982;&#x4F55;&#x5EFA;&#x7ACB;&#xFF0C;&#x8BF7;&#x770B;&#x4E0B;&#x4E00;&#x8282;&#x3002;</p>
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